Process for the fabrication of a self-healing polyurethane film and obtained product.

摘要

Process for the manufacture of a coating layer made of heat-curable polyurethane having self-healing properties. …According to the invention the isocyanate component is essentially a diisocyanate or a mixture of diisocyanates in the form of monomers capable of forming an isocyanate trimer by a trimerisation reaction in the presence of a specific catalyst, the reaction mixture of the diisocyanate and of the polyol component, containing a trimerisation catalyst, is deposited by casting or spraying onto the support for forming the layer, and the trimerisation reaction is carried out on the said support, together with the polymerisation of the polyurethane layer under the effect of heat. …The coating layer is employed in safety glazing.